About

Gatien Cosendey

Gatien started his underwater journey in 2013 with a try dive in Bora Bora and took his Open Water Diver course later that year in the cold and dark waters of Lake Leman, Switzerland. He demonstrated an early interest for overhead environments, enjoying ice diving and then cave diving.
The willingness to share his passion with others brought him to take a first instructor class and shortly after a DSLR camera underwater. Since then, he continuously worked on sharpening his teaching and photography skills: they both are efficient tools to enable people to discover the marvelous underwater world.
He is often seen in his yellow SF-Tech dry suit diving Swiss lakes and caves, and enjoy diving caves, mines and wrecks across Europe.
Besides diving, Gatien holds a Master’s degree in Physics and a PhD in Photonics from the École Polytechnique Fédérale de Lausanne and works as an optical engineer in the field of augmented and mixed reality.

Galathea Festival

November 22, 2025
Galathea de Bronze
Category wide angle – expert

Portes Ouvertes de la Culture

November 1, 2025
Café des Mines, Travers
Talk on our exploration project

ArcInfo

October 30, 2025
La Presta mines exploration project

Riviera Chablais Hebdo

October 29, 2025
Photogrammetry of the Focke Wulf 58

Cavernes

2024
Asphalte mine exploration project

Nereus

N°1 2025
Diving in Scapa Flow

Dive Festival UW Photo Contest

January 2025
Winner – Wide angle

CMAS.CH

January 2025
Assemblée générale Romandie
Talk on Hirondelle photogrammetry project

Nereus

N°4 2024
Photogrammetry projects in the Vierwaldstättersee

Riviera Chablais Hebdo

September 25, 2024
Mine exploration project in Travers, NE

Maison Visinand – Espace culturel

September 6 to October 6, 2024
Photography and photogrammetry exhibition

Nereus

N°3 2024
Photogrammetry of the cochère shipwreck

Nereus

N°2 2024
Photogrammetry of the Hunter airplane wreck

Vibiscum

April 3, 2024
Hirondelle photogrammetry project talk

Nereus

N°1 2024
Photogrammetry of the Hirondelle shipwreck

Dive Tec! Event

November 11-12, 2023
Photogrammetry exhibition

Le Nouvelliste

November 18, 2023
My contribution to Saillon Cité d’Images

Saillon Cité d’Images

Edition 2023-2024
Invited photographer

RTS

May 15, 2023
19h30

Riviera Chablais

April 26, 2023
Photogrammetry project on the Hirondelle wreck

SANTI Photo Awards

4th place at 2022 contest

Search for Atlantis 2022

OrcaTorch photo contest
3rd place

Festisub 2022

Honorable mention

Conférence du Parc

December 7, 2021
Parc naturel régional Gruyère Pays-d’Enhaut
Ice diving in Lake Lioson

Centre Manor Vevey

August 23 to September 4 2021
Photo exhibition

Dive Tec! Event

August 27, 2021
Photo exhibition

24heures

August 4, 2021
Hirondelle shipwreck and Quai Perdonnet

Divesoft

Liberty CCR catalogue 2021

Delma H2O Photo Contest 2020

Public Prize

Annales Veveysannes

Vol 18, 2020
Diving under Quai Perdonnet and on the Hirondelle shipwreck

Terre&Nature

Published February 6 2020
Ice diving in Lioson

Plongez!

N°24, 2019
Diving on the Hirondelle